Caoutchouc composition



Reissued Nov. 1c, 1925,

UNITED STATES Re. 16,417 PATENT OFFICE.

ARTHUR IBIDDLE, 'OF TRENTON, NEW JERSEY, ASSIGNOB '10 UNI'IED PRODUCTS COB- POEATION OI AMERICA, A CORPORATION OF DELAWARE.

caou'rcnouc comrosrrrori,

Nam-swing. Originallio. 1,437,487, dated December 5, 1922,-Serlal R0. 397,178,!11ed1u1y 19, 1920.

Application for reissue fled December 4, 1924, serial 110. 758,972. Divided and this application filed I February 25, 1826. Serial 1T0. 90,899.

The invention relates to a composition of matter or a compound of the nature of r ubber, gutta-percha, balata and like materials and adapted for use in like manner and for 5 like purposes.

Among the objects of the invention is to incorporate or combine casein, or compositions containing casein as anessential ele'- ment, with a rubber-like substance such as rubber, gutta percha, balata and the like, or compositions thereof, in the form or state in which they exist as crude or refined latex.

Another object of the invention is to make a compound or composition of matter of the nature above mentioned, made by incorporating or combining casein with caoutchouc latex, which will be adapted" for use in various arts, as for exam 1c, in the manufacture of tires, mats, 'noleum substitutes,

flooring, pool and billiard balls, bowling balls, tennis balls, belting, shoe compositions, pavements, insulating materials, household and personal articles, chemical ap aratus and equipment, buttons, flexible a hesives and coatings, waterproofing compositions,

gaskets, washers, bumpers, machinery arts, ebonite and vulcanite compositions, an any other article adapted to be made therefrom.

By the use of the term latex herein IS meant any of'the milky or latioiferous saps or juices obtained from plants, more particularly those yieldin caoutchouc.

By the term caoutc one as used in this disclosure is meant rubber, gutta-percha, ba-

85 late, rubber substitutes and similar substances havin like properties in the form or state.- in which fined latex, as well as compositions or mixtures thereof. Inasmuch as these various 4 substances have essentially substantially identical physical and chemical pro rties and are regarded as equivalents, di ering only in the proportions of resinous and proteinous matter contained therein, they may 4 be spoken of generally by the'term caoutchoue. Under the specific mention of rubber, gutta-percha, and balata is to be understood, also, that the same. may be wholly or partly in the'latex formgorsta'te.

The. term casein is intended to be generic to and to comprehend any or all,

caseinous, albuminous and proteinous matters-in which casem or an equivalent element they exist as crude and re-,.

is an essential ingredient, or any mixture or composition thereof, and as may be obtained from milk, buttermilk, legumens, lentils, as well as may be found combined and mixed with various substances such as alkalies and other chemicals to form casein glues, water,

oils, glycerin, tars, resins, waxes and the like.

The casein may be used in the pure soluble or insoluble state or in the plastic, semiplastic, dry or powdered form as may be more convenient for the pur ses desired.

. Inasmuch as -no two artic es produced in accordance with this invention would have I the ingredients thereof in exactly thesame proportions it isbelieved that it is nonessential to state any particular proportions of the compositions except 'as may be exemplified hereinafter. The important feature of the compound is the addition of casein or similar material.

with the rubber or rubber-like material as crude or refined latex with or without whatever other ingredients may be found of value to make a new and useful compound. Among the said ingredients which have been found of value are filling materials, sul- 1 phides of antimony, sul hur, lime, calciumcarbonate, wood pulp, iquor, shellac, oils, resinous substances, ammonium-carbonate or compounds of ammonia, sodium fluoride, sodium silicate and glycerin.

The casein may be dissolved and added to the various kinds of latexes.

temperatures and treated. with acids and aci salts, sodium-and sulphate, tends to coa. ulate or precipitate. By mixin casein wit latex,-a more eflicient and satis actory incorporating of the whole is'obtained when coagulated or precipitated as above stated. The casein or caseinous substances, in the various forms herein described, may be worked intothe V Such mixture 1 ,when subjected to heat not much above room for example sulphuric acid or rubber materials such as rubber, guttas percha,-balata and tars, rosin and resinous matters tofo'rm a rubber substitute or substitutes particularly adapted for insulating compounds. Balata may not be as useful due to itsscarcity but when used is of especial use in the. belting industry.

The value of using casein in compositions ofrubber, gutta'-percha,.balataand the like,

as above mentioned, lies in its 'insolubilit'y under certain conditions and in its flexibility when combined with non-evaporating substances like oils and tars. ous matters combine readily with lime and other chemicals which have adhesive properties and are especially useful in a compositlon or compound used as waterproofing com ositions. A sealing composition which has, een found satisfactory in practice comprises, in proportions by weight,

Parts. Casein." 100 Ammonium'hydrate 15 Linseed oil 300 Latex 500 Water ".350

Filling materialas desired.

In makin this composition, I have found it practical 'rst to dissolve the casein in the ammonium hydrate and water and then add the latex' to the resulting solution; the filling I material and the linseed oil, which acts in part as a. softener, are referably added last to the composition. oreover, some of the compositions formed by my invention take very readily to vulcanizing in anyof the present methods of vulcanization wherein ure sulphur, sulphur com ounds, sulphur eths and the cold sulp ur process are Casein or caseining app ication, Serial #753,972 file usually employed. vulcanization tends to hardenand thus to'v'vaterproof casein under certain conditions of temperature and 'pres sure.

combinin certain ingredients to make a compoun 1n accordance 'wlth my IIIVBIItlOll it is to be understood, however, that the invention is notlimited to the particular i11 gredients or the mode of treatment herein escribed, but other ingredients having substantially the same or, similar characteristics may be employed in substantially the same manner without departing from the spirit -of the invention and the scope of the ap- A composition ohmatter having adhesive properties comprising caoutchouo latex. casein and ammonium carbonate. V

In witness whereof; I have hereunto set my hand this 16th day of 'F'ebruary,,1926.

ARTHUR BIDDLE.

While I have herein described the mode of 

